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Finding the Fourth Proportional to 139,286.94, 192,210.63 and 75,623.34

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Solution

The fourth proportional to 139,286.94, 192,210.63 and 75,623.34 is: 104,357.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,286.94 : 192,210.63 = 75,623.34 : x
  2. Step 2: Convert to fraction form
    139,286.94/192,210.63 = 75,623.34/x
  3. Step 3: Cross multiply
    139,286.94x = 192,210.63 × 75,623.34
  4. Step 4: Simplify right side
    139,286.94x = 14,535,609,824.10
  5. Step 5: Solve for x
    x = 14,535,609,824.10/139,286.94
  6. Step 6: Final answer
    x = 104,357.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.